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Structure and thickness-dependent gas sensing responses to NO2 under UV irradiation for the multilayered ZnO micro/nanostructured porous thin films

文献类型：期刊论文

作者Su, Xingsong1,2; Duan, Guotao1; Xu, Zongke1; Zhou, Fei1; Cai, Weiping1,2
刊名JOURNAL OF COLLOID AND INTERFACE SCIENCE
出版日期2017-10-01
卷号503期号:无页码:150-158
关键词Multilayered Micro/nanostructured Porous Thin Films Uv Irradiation Gas Sensing Responses Effects Of Porous Structure And Film Thickness
DOI10.1016/j.jcis.2017.04.055
文献子类Article
英文摘要The structure and thickness of the chemiresistive thin films can significantly affect their gas sensing performances for the heating-typed sensors. Under light irradiation, however, their influences are still to be addressed. In present paper, the multilayered ZnO porous thin films with different (three types) micro/nanostructures and controllable thickness are fabricated via layer by layer construction of the self-assembled colloidal-layers. The structural and thickness effects of such films on the gas sensing performances to NO2 under ultraviolet (UV) illumination are experimentally studied. It has been found that under UV irradiation, the responses of the ZnO porous thin films to NO2 increase upto the maxima with the rising film thickness. Further increasing the thickness would lead to the insignificantly or gradually decreasing responses. The film thicknesses corresponding to the maximal responses are associated with the porous structures and the porosity of the thin films. The films with the higher porosity would lead to the higher maximal responses and the larger corresponding film-thicknesses, or vice versa. Such thickness and porous-structure dependences of the responses are attributed to the ever-decaying light intensity (and hence ever-decreasing photo-generated carrier concentration) in the films along the depth from the films' surface. This study is of importance in design and development of the light illuminating typed gas sensing devices with high performances. (C) 2017 Elsevier Inc. All rights reserved.
WOS关键词ROOM-TEMPERATURE ; LIGHT IRRADIATION ; CARBON NANOTUBES ; SENSORS ; OXIDE ; SENSITIVITY ; PERFORMANCE ; MONOLAYER ; SURFACE
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000404316500017
资助机构Natural Science Foundation of China(11374303 ; Natural Science Foundation of China(11374303 ; Natural Science Foundation of China(11374303 ; Natural Science Foundation of China(11374303 ; CAS-SAFEA International Partnership Program for Creative Research Teams ; CAS-SAFEA International Partnership Program for Creative Research Teams ; CAS-SAFEA International Partnership Program for Creative Research Teams ; CAS-SAFEA International Partnership Program for Creative Research Teams ; 51471161 ; 51471161 ; 51471161 ; 51471161 ; 11574313) ; 11574313) ; 11574313) ; 11574313) ; Natural Science Foundation of China(11374303 ; Natural Science Foundation of China(11374303 ; Natural Science Foundation of China(11374303 ; Natural Science Foundation of China(11374303 ; CAS-SAFEA International Partnership Program for Creative Research Teams ; CAS-SAFEA International Partnership Program for Creative Research Teams ; CAS-SAFEA International Partnership Program for Creative Research Teams ; CAS-SAFEA International Partnership Program for Creative Research Teams ; 51471161 ; 51471161 ; 51471161 ; 51471161 ; 11574313) ; 11574313) ; 11574313) ; 11574313)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/31987]  
专题合肥物质科学研究院_中科院固体物理研究所
作者单位1.Chinese Acad Sci, Anhui Key Lab Nanomat & Nanotechnol, Key Lab Mat Phys, Inst Solid State Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Su, Xingsong,Duan, Guotao,Xu, Zongke,et al. Structure and thickness-dependent gas sensing responses to NO2 under UV irradiation for the multilayered ZnO micro/nanostructured porous thin films[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2017,503(无):150-158.
APA Su, Xingsong,Duan, Guotao,Xu, Zongke,Zhou, Fei,&Cai, Weiping.(2017).Structure and thickness-dependent gas sensing responses to NO2 under UV irradiation for the multilayered ZnO micro/nanostructured porous thin films.JOURNAL OF COLLOID AND INTERFACE SCIENCE,503(无),150-158.
MLA Su, Xingsong,et al."Structure and thickness-dependent gas sensing responses to NO2 under UV irradiation for the multilayered ZnO micro/nanostructured porous thin films".JOURNAL OF COLLOID AND INTERFACE SCIENCE 503.无(2017):150-158.

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来源：合肥物质科学研究院

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